bugfindutils - Bugs: bug #18714, <VT> and <FF> also...


bug #18714: <VT> and <FF> also seen as separators by GNU xargs

Submitted by:  None
Submitted on:  Sat 06 Jan 2007 08:51:03 PM UTC  
Category:  xargs Severity:  3 - Normal
Item Group:  Wrong result Status:  Fixed
Privacy:  Public Assigned to:  James Youngman <jay>
Originator Name:  Stephane Chazelas Originator Email:  -email is unavailable-
Open/Closed:  Closed Release:  4.2.29
Fixed Release:  4.3.3

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Sat 13 Jan 2007 06:49:25 PM UTC, comment #2: 

Fixed in the findutils-4.3.x CVS codebase.

This problem is fixed in the CVS code for findutils.
To resolve your problem, you could either wait for the
next official release of findutils, or check out a copy
of the code from the CVS repository for findutils.

James Youngman <jay>
Project AdministratorIn charge of this item.
Sun 07 Jan 2007 06:19:45 PM UTC, comment #1: 

POSIX insicates that arguments are separated by <blank>s and defines a <blank> as...

One of the characters that belong to the blank character class as defined via the LC_CTYPE category in the current locale. In the POSIX locale, a <blank> is either a <tab> or a <space>.

Hence there is certainly a bug.  I think the problem is just that xargs.c uses ISSPACE() on line 831 of the current CVS code when it should in fact call ISBLANK().

James Youngman <jay>
Project AdministratorIn charge of this item.
Sat 06 Jan 2007 08:51:03 PM UTC, original submission:  

xargs is meant to only recognise blanks, that is <SPC>, <NL> and <TAB> as separators in the arguments it receives on input.

GNU xargs happens to also treat all the other space characters (vertical tab (\v), carriage return (\r), form feed (\f)) as separators which is wrong.

~$ printf '\f\r\va' | xargs printf %s | od -tc

              1.   a


Should output instead:

~$ printf '\f\r\va' | od -tc

              1. \f  \r  \v   a




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  • -email is unavailable- added by jay (Posted a comment)

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    Follow 5 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2007-04-15 jay Open/ClosedOpen => Closed
        Fixed ReleaseNone => 4.3.3
    2007-01-13 jay StatusIn Progress => Fixed
    2007-01-07 jay StatusNone => In Progress
        Assigned toNone => jay

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